I have a csv data. the X, and Y columns show bottom left corner of each grid. It is supposed to show as grid square, but it shows points. what is the problem? and is there any way I can make cell grids from these points?

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What software are you using? What have you tried? What do you mean by "grid cells"--a raster or a vector layer of polygons? In what sense are these data "supposed" to display as squares: what's your documentation for that?
–
whuber♦Aug 21 '12 at 19:24